I am using kernel 3.7.2-201.fc18.x86_64 (Fedora 18) and no libdrm_radeon and am also experiencing this problem. Problem not present in Fedora 17.
I am using kernel 3.7.2-201. fc18.x86_ 64 (Fedora 18) and no libdrm_radeon and am also experiencing this problem. Problem not present in Fedora 17.